Abstract
A field experiment was conducted on a Typic Hapludoll soil in Indo-gangetic plains of India during the 2008 and 2009 rainy seasons to find out the effect of irrigation schedules and plant spacing on yield, quality, nutrient uptake and economics of two rice ( Oryza sativa L.) varieties under system of rice intensification (SRI) and compare the performance of SRI with conventional transplanting. Treatments under SRI included 12 combinations of 3 irriga- tion schedules, viz. irrigation at 1, 3 and 5 day(s) after disappearance of standing water (DADSW), 2 spacings (20 cm 20 cm, 25 cm 25 cm) and 2 varieties (Pant Dhan 4, Arize 6444), alongwith two control treatments of con- ventional cultivation of each variety. The experiment was set in a RBD with three replications. Irrigation at 1 and 3 DADSW increased uptake of N, P and K in grains, which enhanced grain protein content and milling percentage, and improved grain yield by 8.6 and 5.9% over 5 DADSW (5.82 t/ha), respectively. Net returns and B:C ratio were also better with irrigation at 1 and 3 DADSW. Wider spacing resulted in 4.2% higher yield with better grain quality and 10.8% higher net returns over closer spacing. Yield-wise and profit-wise, both the varieties were suit- able for cultivation under SRI. However, Arize 6444 recorded higher N uptake and protein content. The uptake of P and K was higher in grains of Pant Dhan 4 which showed higher milling percentage. Between two methods, SRI improved N, P and K uptake, milling percentage and protein content. Grain yield was 16.9% higher under SRI compared to conventional method (5.22 t/ha). Due to lower cost of production and higher yields, SRI fetched 56% higher net returns over conventional transplanting.
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Claims 15
Claim · model-written summary
Irrigation at 1 and 3 DADSW increased uptake of N, P and K in rice grains relative to 5 DADSW.
- Taxon
- rice
Oryza sativat0 - Treatment
- Irrigation at 1 and 3 DADSWe0
- Outcome
- uptake of N, P and K in grainse0
- Direction
- increasede0
- Comparator
- 5 DADSWe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation at 1 and 3 DADSW increased uptake of N, P and K in grains, which enhanced grain protein content and milling percentage, and improved grain yield by 8.6 and 5.9% over 5 DADSW”
t0“rice (Oryza sativa)”
Claim · model-written summary
Irrigation at 1 and 3 DADSW enhanced grain protein content and milling percentage in rice relative to 5 DADSW.
- Taxon
- riceOryza sativat0
- Treatment
- Irrigation at 1 and 3 DADSWe0
- Outcome
- grain protein content and milling percentagee0
- Direction
- enhancede0
- Comparator
- 5 DADSWe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation at 1 and 3 DADSW increased uptake of N, P and K in grains, which enhanced grain protein content and milling percentage, and improved grain yield by 8.6 and 5.9% over 5 DADSW”
t0“rice (Oryza sativa)”
Claim · model-written summary
Irrigation at 3 DADSW improved rice grain yield by 5.9% over 5 DADSW (5.82 t/ha).
- Taxon
- riceOryza sativat0
- Treatment
- Irrigation at 1 and 3 DADSWe0
- Outcome
- grain yielde0
- Direction
- improvede0
- Value
- 5.9%e0
- Qualifier
- 3 DADSWe0
- Comparator
- 5 DADSWe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation at 1 and 3 DADSW increased uptake of N, P and K in grains, which enhanced grain protein content and milling percentage, and improved grain yield by 8.6 and 5.9% over 5 DADSW”
t0“rice (Oryza sativa)”
Claim · model-written summary
Net returns and benefit-cost ratio were also better with irrigation at 1 and 3 DADSW.
- Taxon
- riceOryza sativat0
- Treatment
- irrigation at 1 and 3 DADSWe0
- Outcome
- Net returns and B:C ratioe0
- Direction
- bettere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Net returns and B:C ratio were also better with irrigation at 1 and 3 DADSW”
t0“rice (Oryza sativa)”
Claim · model-written summary
Wider spacing gave 4.2% higher rice yield than closer spacing.
- Taxon
- riceOryza sativat0
- Treatment
- Wider spacinge0
- Outcome
- yielde0
- Direction
- highere0
- Value
- 4.2%e0
- Comparator
- closer spacinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wider spacing resulted in 4.2% higher yield with better grain quality and 10.8% higher net returns over closer spacing”
t0“rice (Oryza sativa)”
Claim · model-written summary
Wider spacing gave better rice grain quality than closer spacing.
- Taxon
- riceOryza sativat0
- Treatment
- Wider spacinge0
- Outcome
- grain qualitye0
- Direction
- bettere0
- Comparator
- closer spacinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wider spacing resulted in 4.2% higher yield with better grain quality and 10.8% higher net returns over closer spacing”
t0“rice (Oryza sativa)”
Claim · model-written summary
Wider spacing gave 10.8% higher net returns than closer spacing.
- Taxon
- riceOryza sativat0
- Treatment
- Wider spacinge0
- Outcome
- net returnse0
- Direction
- highere0
- Value
- 10.8%e0
- Comparator
- closer spacinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wider spacing resulted in 4.2% higher yield with better grain quality and 10.8% higher net returns over closer spacing”
t0“rice (Oryza sativa)”
Claim · model-written summary
Variety Arize 6444 recorded higher N uptake and protein content.
- Taxon
- riceOryza sativat0
- Material
- Arize 6444e0
- Outcome
- N uptake and protein contente0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Arize 6444 recorded higher N uptake and protein content”
t0“rice (Oryza sativa)”
Claim · model-written summary
Grains of Pant Dhan 4 had higher uptake of P and K.
- Taxon
- riceOryza sativat0
- Material
- Pant Dhan 4e0
- Organ / stage
- grainse0
- Outcome
- uptake of P and Ke0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The uptake of P and K was higher in grains of Pant Dhan 4 which showed higher milling percentage”
t0“rice (Oryza sativa)”
Claim · model-written summary
Pant Dhan 4 showed higher milling percentage.
- Taxon
- riceOryza sativat0
- Material
- Pant Dhan 4e0
- Outcome
- milling percentagee0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The uptake of P and K was higher in grains of Pant Dhan 4 which showed higher milling percentage”
t0“rice (Oryza sativa)”
Claim · model-written summary
Both varieties were suitable for cultivation under SRI in terms of yield and profit.
- Taxon
- riceOryza sativat0
- Outcome
- suit- able for cultivation under SRIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield-wise and profit-wise, both the varieties were suit- able for cultivation under SRI”
t0“rice (Oryza sativa)”
Claim · model-written summary
SRI improved N, P and K uptake compared with the conventional method.
- Taxon
- riceOryza sativat0
- Treatment
- SRIe0
- Outcome
- N, P and K uptakee0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Between two methods, SRI improved N, P and K uptake, milling percentage and protein content”
t0“rice (Oryza sativa)”
Claim · model-written summary
SRI improved milling percentage and protein content compared with the conventional method.
- Taxon
- riceOryza sativat0
- Treatment
- SRIe0
- Outcome
- milling percentage and protein contente0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Between two methods, SRI improved N, P and K uptake, milling percentage and protein content”
t0“rice (Oryza sativa)”
Claim · model-written summary
Grain yield was 16.9% higher under SRI than under the conventional method (5.22 t/ha).
- Taxon
- riceOryza sativat0
- Treatment
- SRIe0
- Outcome
- Grain yielde0
- Direction
- highere0
- Value
- 16.9%e0
- Qualifier
- 5.22 t/hae0
- Comparator
- conventional methode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield was 16.9% higher under SRI compared to conventional method (5.22 t/ha)”
t0“rice (Oryza sativa)”
Claim · model-written summary
SRI fetched 56% higher net returns than conventional transplanting due to lower production cost and higher yields.
- Taxon
- riceOryza sativat0
- Treatment
- SRIe0
- Outcome
- net returnse0
- Direction
- highere0
- Value
- 56%e0
- Comparator
- conventional transplantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Due to lower cost of production and higher yields, SRI fetched 56% higher net returns over conventional transplanting”
t0“rice (Oryza sativa)”
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